The technological trend of high energy density Li-ion batteries for vehicles

doi:10.19799/j.cnki.2095-4239.2021.0376

Abstract

Abstract:

Lithium-ion batteries are the mainstream power source of new energy vehicles. Their energy density directly determines the vehicle mileage and is related to the competitiveness and long-term development of the new energy vehicle industry. To investigate the global trend of technologies in this field, this study expounds the evolution of annual patent applications in the world and in China by comparing and analyzing the patent technology of major countries and applicants based on the search results of the Innojoy Patent Search Engine. Based on the IPC technology classification, this study analyzes the technical themes focused on and the efficacy achieved by major applicants. The results show that the number of patent applications for high-energy density Li-ion batteries for vehicles is growing steadily worldwide and in China. Although the applications from China account for the largest number in the world, they include a few basic and core patents, and their patent layout is mainly limited to the domestic scope. Compared to Japanese enterprises, Chinese enterprises still fall behind in the field of key technologies. Improving the main materials and the manufacturing process of the electric core and ameliorating the module-group technology of battery cells are the main technical paths for elevating the energy density. Technologies that consider both high energy density and high security are not only the weak area of the current research and development (R&D) but also the key position to seize the priority of R&D in the future. Based on a prior analysis, this study puts forward suggestions on the R&D and patent layout of high-energy density lithium-ion batteries for vehicles from the perspective of China.

Key words: high energy density Li-ion batteries for vehicles, patent analysis, data mining, intellectual property

CLC Number:

G 353.1

Wenting JIN, Mansheng LIAO, Ji HUANG, Zidong WEI. The technological trend of high energy density Li-ion batteries for vehicles[J]. Energy Storage Science and Technology, 2022, 11(1): 350-358.

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References 10

1	黄云辉. 锂离子电池: 20世纪最重要的发明之一[J]. 科学通报, 2019, 64(36): 3811-3816.
	HUANG Y H. Lithium-ion battery: One of the most important inventions in the 20th century[J]. Chinese Science Bulletin, 2019, 64(36): 3811-3816.
2	诤言. 对“后补贴阶段”多些信心[N]. 人民日报, 2020-01-22(18).
3	杨续来, 张峥, 曹勇, 等. 高能量密度锂离子电池结构工程化技术探讨[J]. 储能科学与技术, 2020, 9(4): 1127-1136.
	YANG X L, ZHANG Z, CAO Y, et al. The structural engineering for achieving high energy density Li-ion batteries[J]. Energy Storage Science and Technology, 2020, 9(4): 1127-1136.
4	吕峥, 宋佳丽, 孙峙, 等. 中国锂离子电池回收技术知识产权分析[J]. 清华大学学报(自然科学版), 2019, 59(7): 551-557.
	ZHENG L,SONG J L, SUN Z, et al. Intellectual property analysis of lithium-ion battery recycling methods in China[J]. Journal of Tsinghua University (Science and Technology), 2019, 59(7): 551-557.
5	瞿海妮, 马廷灿, 戴炜轶, 等. 液流电池技术国际专利态势分析[J]. 储能科学与技术, 2016, 5(6): 926-934.
	QU H N, MA T C, DAI W Y, et al. The analysis of international patents in flow cell technology[J]. Energy Storage Science and Technology, 2016, 5(6): 926-934.
6	XIE J, LU Y C. A retrospective on lithium-ion batteries[J]. Nature Communications, 2020, 11(1): doi: 10.1038/s41467-020-16259-9.
7	GAN R Y, LIU Y L, YANG N, et al. Lithium electrodeposited on lithiophilic LTO/Ti₃C₂ substrate as a dendrite-free lithium metal anode[J]. Journal of Materials Chemistry A, 2020, 8(39): 20650-20657.
8	GAN R Y, YANG N, DONG Q, et al. Enveloping ultrathin Ti₃C₂ nanosheets on carbon fibers: A high-density sulfur loaded lithium-sulfur battery cathode with remarkable cycling stability[J]. Journal of Materials Chemistry A, 2020, 8(15): 7253-7260.
9	OTOYAMA M, SAKUDA A, TATSUMISAGO M, et al. Sulfide electrolyte suppressing side reactions in composite positive electrodes for all-solid-state lithium batteries[J]. ACS Applied Materials & Interfaces, 2020, 12(26): 29228-29234.
10	LIU K, LIU Y, LIN D, et al. Materials for lithium-ion battery safety[J]. Science Advances, 2018, 4(6): doi: 10.1126/sciadv.aas9820.

序号	专利家族规模/件	中国		美国		日本		韩国
序号	专利家族规模/件	专利数/件	占比/%	专利数/件	占比/%	专利数/件	占比/%	专利数/件	占比/%
1	≤3	1148	87.97	156	39.59	257	61.34	88	38.10
2	>3～6	93	7.13	123	31.22	101	24.11	79	34.20
3	>6～9	37	2.84	51	12.94	31	7.40	34	14.72
4	>9	27	2.07	64	16.24	30	7.16	30	12.99

排名	IPC	技术领域	数量/件
1	H01M10/0525	摇椅式电池，即其两个电极均插入或嵌入有锂的电池；锂离子电池	244
2	H01M4/13	非水电解质蓄电池的电极，例如用于蓄电池的，其制造方法	202
3	H01M4/36	作为活性物质、活性体、活性液体的材料的选择	164
4	H01M4/505	插入或嵌入轻金属且含锰的混合氧化物或氢氧化物，例如LiMn₂O₄或LiMn₂O_xF_y	142
5	H01M4/58	除氧化物或氢氧化物以外的无机化合物，例如硫化物、硒化物、碲化物、氯化物或LiCoF_y的；聚阴离子结构的，例如磷酸盐、硅酸盐或硼酸盐	140
6	H01M4/525	插入或嵌入轻金属且含铁、钻或镍的混合氧化物或氢氧化物，例如LiNiO₂、LiCoO₂或LiCoO_xF_y(电极)	135
7	H01M4/62	在活性物质中非活性材料成分的选择，例如胶合剂、填料	120
8	H01M10/056	用于电解质的材料，如无机/有机混合电解质	116
9	H01M10/052	锂蓄电池	80
10	H01M10/058	构造或制造	77

[1]	Yuqi SUN, Feng WEI, Hong ZHOU, Chaofeng ZHOU. Analysis of global lithium-sulfur battery technology competition from the perspective of patent [J]. Energy Storage Science and Technology, 2022, 11(5): 1657-1666.
[2]	Yun TANG, Fang YUE, Kaimo GUO, Lanchun LI, Wangsong KE, Wei CHEN. Analysis of the development trend and the innovation ability of an all-solid-state lithium battery technology [J]. Energy Storage Science and Technology, 2022, 11(1): 359-369.
[3]	Xi LI, Yajuan YU, Zhiqi ZHANG, Lei WANG, Kai HUANG. Advance and patent analysis of solid electrolyte in solid-state lithium batteries [J]. Energy Storage Science and Technology, 2021, 10(1): 77-86.
[4]	SHENG Dongdong, WANG Haitao, SHI Yingjie, DU Hong. Patent analysis of the high-specification and high-voltage lithium-ion battery technology [J]. Energy Storage Science and Technology, 2020, 9(4): 1214-1219.
[5]	ZHOU Hong, WEI Feng, WU Yongqing. Research on the development of inorganic solid-state electrolyte for lithium battery based on patent analysis [J]. Energy Storage Science and Technology, 2020, 9(3): 1001-1007.
[6]	CAO Yinhu, LIU Feng, LIU Mei, YANG Weichao, WEI Baozhi, WANG Chengyang. Patent application of silicon-based anode for lithium-ion batteries [J]. Energy Storage Science and Technology, 2019, 8(5): 967-974.
[7]	CHEN Jinpan, ZHAO Hong, ZHONG Guobin, HU Qiaoming, DENG Wen, XU Lixin, LAI Junke, LI Chaofan, CHEN Xiaochuan. Patent technology development trend analysis of lithium-ion battery energy storage system [J]. Energy Storage Science and Technology, 2019, 8(3): 602-608.
[8]	YU Zhimin, SU Jia. Analysis of Toyota's patents on lithium ion solid electrolyte [J]. Energy Storage Science and Technology, 2019, 8(3): 609-612.
[9]	CHEN Jinpan, LIU Qiao, QIU Gang. Development trend and countermeasure of electric power storage based on patent analysis [J]. Energy Storage Science and Technology, 2019, 8(3): 613-618.
[10]	SHAO Nan, JI Xiaodan. Patent analysis of lithium ion power battery recycling technology [J]. Energy Storage Science and Technology, 2018, 7(S1): 102-107.
[11]	WANG Shuo1,2, ZHANG Jun3 . Research on patent status and process route of hydrogen production in China [J]. Energy Storage Science and Technology, 2018, 7(2): 353-362.
[12]	YAN Changqing, CAO Yong. Patent analysis of lithium-sulfur battery technology in China [J]. Energy Storage Science and Technology, 2017, 6(S1): 74-.
[13]	ZHANG Bin1,2, CHEN Yongchong1, ZHANG Yanping1, FENG Caimei1,2, LIU Dandan1, HE Yingyuan1,2. The international patent technology analysis on lithium slurry battery#br# [J]. Energy Storage Science and Technology, 2017, 6(5): 1000-1007.
[14]	YU Zhimin, ZHOU Shuhong, YAN Cheng, ZHANG Jian. Analysis of patents on nickel cobalt manganese based cathode material for lithium-ion battery [J]. Energy Storage Science and Technology, 2017, 6(3): 596-604.
[15]	YU Tao, ZHOU Shuhong, YAN Cheng, ZHANG Jian . Analysis of patents on electrolyte for lithium-ion battery [J]. Energy Storage Science and Technology, 2017, 6(2): 316-322.